Disorder-induced phase transition of vortex matter in MgB2 -: art. no. 012502

被引：40

作者：

Angst, M ^{[2
]}

Puzniak, R

Wisniewski, A

Jun, J

Kazakov, SM

Karpinski, J

机构：

[1] Polish Acad Sci, Inst Phys, PL-02668 Warsaw, Poland

[2] Swiss Fed Inst Technol, Solid State Phys Lab, CH-8093 Zurich, Switzerland

来源：

PHYSICAL REVIEW B | 2003年 / 67卷 / 01期

关键词：

D O I：

10.1103/PhysRevB.67.012502

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Measurements of single crystal MgB2 with torque magnetometry in fields up to 90 kOe reveal a sharp peak in the irreversible torque at about 0.85 H-c2. In the region between peak onset and maximum, pronounced history effects occur. Angle and temperature dependence of the characteristic peak fields track those of H-c2. The features observed suggest that the peak marks a disorder-induced phase transition of vortex matter between a quasiordered Bragg glass and a highly disordered phase.

引用

页数：4

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